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P. BURCKHARDT.

(No Model.)

GRAIN STBAMER.

No. 305,142. Patented sept. 16, 1884.

Lavera 011;

UNITED STATES PATENT OEEIcEQ FREDRIGH BURCKHARDT, OF ST. CHARLES, MISSOURI.

GRAIN-STEAMER.

SPECIFICATION forming part of Letters Patent No. 305,142, dated September 16, 1884i Application filed December 31, 1883. (No model.)

To a/ZZ whom, it may concern:

Be it known that I, FREDRIer-r Bonen- HARDT, of St. Charles, in the county of St. Charles and. State of Missouri, have invented a certain new and useful Improvement in Grain-Stean1ers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure lis a side elevation, part in vertical section. Fig. 2 is an end elevation, part in section. Fig. 3 is a detail top view of one of ors A2, driven or turned by means of a shaft,

A3, with which they are connected by miterwheels A4. The flights of the screw-conveyers consist of brushes secured'to the shafts `by bent plates A5,. (see Figs. 4 and 5,) the materialfrom which the brushes are made'being bent and passed through holes in'the plates and held from coming out by wires A. .The brushes are made of bent steel wires.- The plates are connected to the shafts by screws A7 or by other suitable means. By making the flights of the screw-conveyersof metallic brushes they polish and keep clean the interior of the tubes.

ASV represents the pipe or 4spout through the spout through which it is discharged.

A10 represents the stealnsupply pipe, and A the pipe for the exhaust.

A12 represents passage-ways forming communications between the opposite ends of the conveyer-tubes, so that the corn or grain will be discharged from one into another at oppesite ends of the apparatus, as shown by the 4arrows in Fig. l.

Al represents openings in the tops of the con ve ver-tubes,wl1ich are controlled by valves AM. The steam, entering the-top of the apparatus, circulates through the tubes by means of the openings A1, heating t-he corn as it is conveyed from end to end of the tubes, for the purpose of putting it in a condition to have the hulls removed, and by means of the valves any desired amount of steam may be allowed to enter the tubes.

A15 represents peep-holes in the outer casi-ng, closed by doors A1, so that the interior of the apparatus may be examined.

l. A grain-steamer comprising an outer easing, steam-pipes, grain supply and discharge pipes, and conveyer tubes provided with screw-conveyers and openings supplied with valves, said convey'erftubes communicating at their opposite ends, asset forth.

2. In a grain-steamer, the combination,with conveyei-tubes and shafts, of the bent plates having perforations, brushes formed of wires projecting through the perforations7 land securing-wires, as set forth.

EREDRICH BUnoKHAEDr.

In presence of- JN0. T. POWELL, R. S. NELSON.

which the grain enters the apparatus, and AU 

